package com.yootk;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.*;

class Ticket {
    private int count = 3;
    private Lock lock = new ReentrantLock();

    public void sale() {
        this.lock.lock();
        try {
            if (this.count > 0) {
                TimeUnit.SECONDS.sleep(1);
                System.out.println("【" + Thread.currentThread().getName() +
                        "】卖票，剩余票数：" + this.count--);
            } else {
                System.err.println("【" + Thread.currentThread().getName() +
                        "】票已卖完了，明天再来！");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            this.lock.unlock();
        }
    }
}

public class YootkDemo7 {
    public static void main(String[] args) throws Exception {
        Ticket ticket = new Ticket();

        for (int x = 0; x < 5; x++) {
            new Thread(() -> {
                ticket.sale();
            }, "售票员-" + x).start();
        }
    }
}